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  1. Transport Canada
  2. CANUTEC
  3. Emergency Response Guidebook 2012
  4. Table 3 - Initial Isolation and Protective Action Distances for Different Quantities of Six Common TIH Gases

Table 3 - Initial Isolation and Protective Action Distances for Different Quantities of Six Common TIH Gases

How to Use the Common TIH Table (Table 3)

Table 3 lists Toxic Inhalation Hazard materials that may be more commonly encountered.

The selected materials are:

The materials are presented in alphabetical order and provide Initial Isolation and Protective Action Distances for large spills (more than 208 liters or 55 US gallons) involving different container types (therefore different volume capacities) for day time and night time situations and different wind speeds.

Change to imperial units

  1 :Page 1 of Common TIH    2 :Page 2 of Common TIH    3 :Page 3 of Common TIH    Next Page of Common TIH
Transport 
Container		 UN 1005 Ammonia, anhydrous: Large Spills
First Isolate in all directions Then Protect persons Downwind during
Day Night
Low wind
(<10 km/h)		 Moderate wind
(10 - 20 km/h)		 High wind
(>20 km/h)		 Low wind
(<10 km/h)		 Moderate wind
(10 - 20 km/h)		 High wind
(>20 km/h)
m km km km km km km
Rail tank car 300 2.3 1.3 1.0 6.3 2.6 1.3
Highway tank truck
or trailer		 125 1.0 0.5 0.3 2.6 0.8 0.5
Agricultural nurse tank 60 0.6 0.3 0.3 1.5 0.5 0.3
Multiple small cylinders 30 0.3 0.2 0.2 0.8 0.3 0.2
Transport
Container		 UN 1017 Chlorine: Large Spills
Rail tank car 1000 11+ 9.0 5.5 11+ 11+ 7.1
Highway tank truck
or trailer		 1000 10.6 3.5 2.9 11+ 5.5 4.2
Multiple ton cylinders 400 4.0 1.5 1.1 7.9 2.7 1.5
Multiple small cylinders
or single ton cylinder		 250 2.6 1.0 0.8 5.6 1.8 0.8
  1 :Page 1 of Common TIH    2 :Page 2 of Common TIH    3 :Page 3 of Common TIH    Next Page of Common TIH

” + ” means distance can be larger in certain atmospheric conditions

Date modified:
2012-08-08